Concrete floor construction.



J. KAHN.

CONCRETE FLOOR CONSTRUCTION.

APPLIGATON FILED JAN.5.1912.

aftentsd 00h. i935,

o l QU TVES 555% yell/ugly@ 7 y COYCRE'IE FLGE CONSTR'UCTCN.

Speccaton of Letters Paten t.

Application led 5mm-ary 5. 3.912. Serial No. 669,627. n

Be it known that lD ,litmus HAHN, u eiti of the United States, und u resident of Detroit, in the county of vllnynt and State rt Michigan, have in.'ented a new und usel Conor te Flootonsti'iietioii7 of which the 'following is i epecilication.

This invention relates to the construction ot light, reinforced conm-ete floors, mid its object ie to provide means for rapidi)7 :ind eeonoinie; lli7 forming such floors with nirH riqiziees in the interior ot the eoiuretej which 'floor en he rapidly constructed at low oost.

ln the accompanying; drawing' l `inre l is 21 perspeetive View of this improved floor eonslrnet. Fig. 2 is; :i perspective View of one ol? the forms or molde 'for 'lo ininjgg the hollowY nir-spztees. Figs. 3 :lud l are views on n larger s :ale showing' the method ol' lim-ming' the corners ot` the toi-ine or molds.

lo. Ylire-prooiI building;` construction, where, stability combined with light v-:eight is deeired, it is eonnnon to employ a ceiling ,Lilith ol concrete, integral with parallel joists eN.- ten ling demnvnrdly troni the sinh, which joists ure reinibrced hy menne ot' steel te Sion nienihers. Such lioors :1re ott/en ohjeetionohle hemos-e the jo'.,ts are nl'wnjvs in Vfull View. 'hei'e lint Qeilin nre desired it is enfatonmry to pine-e terra-rotin tiles in pai-nh lel rows upon n 'fnlrenrorhx `then lo place the reinforcing nienihers in the spaces; between the rows, und linzilly to pour concrete into the spaces hetween the rows and over the entire nrt-ii. thus llorining :t slid) ot oonrrele strengthened hy reinlonred .ioists which are separated hy the terra-cotta. tiles, These terra-soltar tiles are h any und :nld little to the slrv fth of the floor; on the eoiitrmjv. their Weight requires the reinforced eoncrete portion oil" the floor to he. nmde h favier in order to support the additional dead weight.

'lin the construction shown in the dm 'ings' the to1'1zrcottn tiles are replaced hy forms or molds of pressed sheet-metal halting); tops l :nid sides rl'hese forms or molds :ire pressed up troni thin sheet-Steel, zuid formed with transversely corrugated tops and sides. To prevent concrete enteringi the ends oli these molds, preesed dieet-metal Caps may he plneed over their ende, which oups have ends il. sides 4 und toys lheqe ends also ernhly serrated so that the sharp points G may he utilized to prevent the lower from moving; laterally. lh the Construction oi? n door of this character, sheets of metal-- luth 7., preferably proifidei, with ribs L, are laid directly ou the faisew'voil; to extend over the entire aren to he epanned. The sheet-metal forms or molds are their pos-'itioned in parallel rows the points G engage;- iney the niefehes of the luth. lt rihheddath is einploymh :is shown in the thrziwing7 the rihs will extend no between the pointe l Should n point efnne iiniiiedizttely above i rib. then the ril) muy he lient laterally with little effort. v

rthe reinforcing steel hers i9., olil my de sire-fl type; are the?l placed iii the speoes he tween zuljneent molde; :ind the eoiifrete ll lilled in hetween and over the molds. .his Concrete will usually Aform :i hond with the inetnlhith at the bottoms of the joists, but to insure more perfect union, small' holes muy he punched tl'nougi'h the rihs 9' and wires l2 pushed through these holes and lient 'nim'zlrth :1S shown in Fig. l. is n result. when the concrete sets around these wire-1. the sheet-nh will he lfirmly tied in position. 'lhe lower fece of the htth may then he i'histered in the usual manner.

To forni the molds in such it manner its to ve them ninxinnini strength where they would otlnvn'se he Week/csh the consten@- tion shown in Figs. 3 ond, #i is employed. The sheet-inetnl forced outward from the eonrnve parte '13 of the -eorruggzttions so as to loro) rihs l5. extending.;- outward to neuilly the line of the eoni'elv: parts lll. rl'fhese ribs; not only serre to stiften the entire strnetnrev7 hut they also serve to prevent the forms or molds 'from slipping;1 out when the floor is complete. as they enter the concrete and hoy the 'forms or molds in place. lf desired, the lower 'faee of the me :tllzrth may he covered with n. thickness of plaster 16.

Owing to the light Weight of these molds, they can he shipped. long distances :it low rates, and :is the Sides Slightly diverge down-- Werdly, the forms or molds een he nested zio.

` y rennes und are i-lnie protected freni injury. Owing (o their lightness und comparatively large sizes the work of placing them in position is enly e smell fraction of that required to poeiiion tierra-colite tiles for the Same aree.

l claimil: ln. n concrete floor construction, the ci'milninnlii'ni of relicnlnled' ine'lnlelaili, n Series; el sheeianelnl forme lying parallel lo mieli other on ihe lniih nd having serrated lower edge@ 'which :Sei-ratione engage in and inierliwh will; lhe meshes olf ihe lnlht reinon-ing lors in lhe maree between the forme, :ind coni le erle-nd owr (he inolde io n end und oevvren the foi-ins le forni Yin :i Concl-ele door cenel'rncl'ion, the :rm-,binirziim o?" reicnlffiiied rililled-n'ietnl-lnh, :i series :-,l1\ i`=eiineel forms cenprieing 1re isverseiy corrugnl'ed sidee ond tops :ind heling serrined lower edgeeI engaging and miei-locking' willi the meshes or' lie lnih, mid ifornxs lyinn 'gnirnllel ilo euch other on the lcnli rmi-ner; v o ihe 'z5-ille ol' hijleli, conere'e exlendnoTX over l'hc tope of lie 'orinl :ind inio the @prices behfeen rhein, reinforcing here ,in ille (-ozrorije'ge between the jlormfs, und snpporing wires exendingg ilu-(negli the rihe ol." ille lnh :ind np into the concrete.

ln :i monete lied construe'ion,y the emnliinnlion olf reiiinlniad ineni-lnll e.\' dine e er ille eren lo lie spanned, Series nielzil molde ifi'irnied Willi trenevereely corrugated sideI :ind tops lying prr- :illol lo each other on the lelh und having lixeir lower edges for. red will; eet'h te en- Ioge in and inlerleck willi the meshes of the ietf, 'cops erdencling; over llzhe ends of the forms and formed with transversely corregeteff lops, ends und sides, concrete ex tending over and between said forms, und

reinforcingl leurs in the concrel'c between .so "d forms.

Ll.Sln-zet-ineliel floor molde consisting of transversely corrugated sides and tops, the metal et the lines of juncture of the sides and tops being forced outward from the bottoms 'of the concave parte lo form lines of sli llening ribs.

5. Sheet-metal 'floor molde consisting of' seid Iside welle being; provided with projections adopted for engagement withV the morilles o'lt lalhing, iihereloy preventing. displacement of ille :forni when positioned in ille floor.

5l. A sheet lnenl Aform for floor constrn(I` lion ol. open llox-lile shape comprising n, lop und Hides corrugated :zt their lower edges, and braces inlejfrnl with the iop und sides connectingA` them.

ln iieelirnony whereof speciicntiim in. the ing' Wilnesees.

have signed this presence ol' wo euloserio .lCnNA (livrnnmn Hnin,

lewin M. l/VOOD. 

